sourcing map Reduced Shank Twist Drill Bits 14mm Black Nitride & Gold Titanium Coated High Speed Steel 4341 with 10mm (3/8") Shank for Stainless Steel Alloy Metal Plastic Wood

Reasonable quality for the money. Have used several times drilling steel up to 3/4mm thick no problem.

Great quality another add to for the workshop.

I needed a reduced shank 14mm for drilling through wood to fit a spy whole and this worked great.

Of a holes diameter for bolt on subframe

This works fine provided you treat it with respect, ie oil it as its being used and don't press too hard so it doesn't heat up

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The media could not be loaded.  Purchased this as I needed a 14.5mm bit that would fit in a 10mm chuck. I also needed an accurate hole to accommodate a 14mm rod so needed 14.5mm or 9/16".I tried a test hole first in soft pine with a cordless Milwaukee drill. There was an immediate and horrible wobble that became more violent the deeper the drill went. The hole ended horribly oversized.I then put the bit in my UJK Drill Guide which has zero radial play so I could examine the runout. Without measuring with gauges the runout at the tip was visibly in excess of 1mm.If this bit were used in a drill guide, pillar drill or lathe to drill metal (as it is designed for) you'd likely suffer damage to the bearings.This is the sort of thing that gives Chinese engineering such a bad reputation.Lesson learned - I'll stick with the major brands in future.

Big drill small shank, very handy.